:root {
  color-scheme: light dark;
  --bg: #eef6f5;
  --card: #ffffff;
  --ink: #0d1f1e;
  --ink-2: #4f6462;
  --dim: #8a9c9a;
  --line: #dbe8e6;
  --field: #eef6f5;
  --accent: #2dd4bf;
  --accent-ink: #0d1f1e;
  --accent-soft: #cdf5ee;
  --danger: #d12c2c;
  --shadow: 0 1px 2px rgb(13 31 30 / 6%), 0 8px 24px rgb(13 31 30 / 6%);
  --radius: 22px;
  --font: ui-rounded, "SF Pro Rounded", "Segoe UI Variable", "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #08100f;
    --card: #111c1b;
    --ink: #ecf8f6;
    --ink-2: #a3bcb9;
    --dim: #66807d;
    --line: #243634;
    --field: #1a2827;
    --accent-soft: #0f3d38;
    --danger: #ff7b7b;
    --shadow: 0 1px 2px rgb(0 0 0 / 40%), 0 8px 24px rgb(0 0 0 / 35%);
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; -webkit-tap-highlight-color: transparent; }

body {
  margin: 0;
  min-height: 100dvh;
  background: var(--bg);
  color: var(--ink);
  font: 1rem/1.4 var(--font);
  overscroll-behavior-y: none;
}

main {
  max-width: 30rem;
  margin: 0 auto;
  padding: calc(env(safe-area-inset-top, 0px) + 1.25rem) max(1rem, env(safe-area-inset-right, 0px)) calc(env(safe-area-inset-bottom, 0px) + 2.5rem) max(1rem, env(safe-area-inset-left, 0px));
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* ---------- Cabecera ---------- */
h1 {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin: 0.5rem 0.25rem 0;
  font-size: 2.1rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
}
h1::before {
  content: "";
  flex: none;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 14px;
  background:
    radial-gradient(circle at 30% 30%, #fff9 0 12%, transparent 13%),
    conic-gradient(from 200deg, var(--accent) 0 62%, #0d9488 0 100%);
  box-shadow: 0 4px 12px rgb(13 148 136 / 40%);
}
.lead { margin: -0.5rem 0.25rem 0.25rem; color: var(--ink-2); font-size: 0.95rem; }

/* ---------- Tarjetas ---------- */
.sheet {
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow);
}

.row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4rem;
  padding: 0.5rem 1.1rem;
  border-bottom: 1px solid var(--line);
  font-size: 1.05rem;
  font-weight: 600;
  transition: background-color 0.2s;
}
.row:last-child { border-bottom: 0; }
.row:focus-within { background: var(--accent-soft); }

.input {
  display: flex;
  align-items: baseline;
  gap: 0.3rem;
  padding: 0.2rem 0.75rem;
  border-radius: 14px;
  background: var(--field);
  color: var(--ink-2);
  font-size: 1.5rem;
  font-weight: 700;
  transition: box-shadow 0.2s, background-color 0.2s;
}
.input > span { font-size: 1rem; font-weight: 600; color: var(--dim); }
.row:focus-within .input { background: var(--card); box-shadow: 0 0 0 2.5px var(--accent-ink); }
@media (prefers-color-scheme: dark) { .row:focus-within .input { box-shadow: 0 0 0 2.5px var(--accent); } }

input[type="text"] {
  width: 5.5rem;
  padding: 0.35rem 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--ink);
  font: inherit;
  text-align: right;
}
input[type="text"]:focus { outline: none; }
input[type="text"]::placeholder { color: var(--dim); opacity: 1; }
.input:has(input[aria-invalid="true"]) { box-shadow: 0 0 0 2.5px var(--danger); }

/* Casilla presentada como interruptor */
input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  position: relative;
  flex: none;
  width: 3.25rem;
  height: 2rem;
  margin: 0;
  border-radius: 999px;
  background: var(--line);
  cursor: pointer;
  transition: background-color 0.2s;
}
input[type="checkbox"]::after {
  content: "";
  position: absolute;
  top: 0.2rem;
  left: 0.2rem;
  width: 1.6rem;
  height: 1.6rem;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 4px rgb(0 0 0 / 30%);
  transition: transform 0.2s;
}
input[type="checkbox"]:checked { background: var(--accent); }
input[type="checkbox"]:checked::after { transform: translateX(1.25rem); }
input[type="checkbox"]:focus-visible { outline: 3px solid var(--ink); outline-offset: 3px; }

.actions { display: flex; justify-content: flex-end; padding-top: 0.75rem; }
button {
  min-height: 2.75rem;
  padding: 0 1.25rem;
  border: 0;
  border-radius: 999px;
  background: var(--card);
  color: var(--ink);
  box-shadow: var(--shadow);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.1s;
}
button:active { transform: scale(0.96); }
button:focus-visible, summary:focus-visible { outline: 3px solid var(--ink); outline-offset: 3px; }

#msg { min-height: 1.4em; margin: 0 0.5rem; color: var(--ink-2); font-size: 0.9rem; }
#msg:empty { display: none; }
#msg.error, .error { color: var(--danger); font-weight: 700; }

/* ---------- Resultado ---------- */
h2 {
  margin: 0;
  padding: 1rem 1.1rem 0.6rem;
  color: var(--ink-2);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

#results { margin: 0; padding: 0 0.5rem 0.5rem; list-style: none; }
.result {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.55rem 0.6rem;
  border-radius: 16px;
  transition: background-color 0.2s;
}
.result + .result { margin-top: 0.15rem; }
.result.has { background: var(--accent-soft); }
.name { font-size: 1.1rem; font-weight: 600; }
.value {
  min-width: 3.5rem;
  padding: 0.05em 0.4em;
  border-radius: 14px;
  color: var(--dim);
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  text-align: center;
  font-variant-numeric: tabular-nums;
}
.result.has .value { background: var(--accent); color: var(--accent-ink); box-shadow: 0 3px 10px rgb(13 148 136 / 35%); }

/* ---------- Detalle ---------- */
details {
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow);
}
summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 3.25rem;
  padding: 0 1.1rem;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}
summary::-webkit-details-marker { display: none; }
summary::after {
  content: "";
  width: 0.55rem;
  height: 0.55rem;
  border: solid var(--ink-2);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
  transition: transform 0.2s;
}
details[open] summary::after { transform: rotate(-135deg); }
#steps { margin: 0; padding: 0 1.1rem 1rem 2.4rem; color: var(--ink-2); font-size: 0.95rem; font-variant-numeric: tabular-nums; }
#steps li { padding: 0.25rem 0; }
#steps li::marker { color: var(--dim); font-weight: 700; }

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}